Chemistry lesson test

What is the formula of water ?

• H2O2
• CO2
• NaCl
• H2O

Is carbon dioxide a gas?

• Carbon dioxide is a type of metal.
• Yes, carbon dioxide is a liquid.
• Yes, carbon dioxide is a gas.
• No, carbon dioxide is a solid.

How is water under big heat called?

• Ice
• Rain
• Snow
• Steam

Answer explanation

Try harder! :/

What does the formula MGCO3 means?

• Magnesium phosphate
• Magnesium carbonate.
• Magnesium oxide
• Magnesium sulfate

Who was Dmitriy Mendeleev?

• Dmitriy Mendeleev was a Russian chemist known for creating the Periodic Table of Elements.
• Dmitriy Mendeleev was a physicist who studied black holes.
• Dmitriy Mendeleev was a famous Russian poet.
• Dmitriy Mendeleev was a biologist known for his work on DNA.

What is the lightest gas in the world?

• Nitrogen
• Hydrogen
• Oxygen
• Helium

What is H30 mean in chemistry?

• OH- (hydroxide ion)
• H3O+ (hydronium ion)
• H2 (dihydrogen)
• H2O (water)

What is a PH in chemistry?

• pH is a measure of the acidity or basicity of a solution.
• pH is the weight of a solution.
• pH measures the temperature of a solution.
• pH is a type of chemical compound.

What is the chemical symbol for gold?

• Fe

• Pb

• Ag

• Au

What is the process of a solid turning into a gas called?

• Evaporation

• Deposition

• Condensation

• Sublimation